Blink is a fast High Intensity Interval Training (HIIT) workout that delivers stunning benefits, like all HIIT workouts. It's quick. It will get you sweaty. It will bring your heart rate up and it will have your heart rate rising. The rest time is sufficient for you to return to base level before doing it all over again. Like the saying goes: "It ain't over until it's over" the difference being you get to decide which level to do it and when it will be over.